The efficiency would plummet off a cliff if the US even tried to approach that level of conflict.
This is incredibly GDP brained thinking. The numbers are not immutable facts that exist as a natural law, ultimately you have to produce those items in the real world. Trying to support that many conflicts at once, which would be fighting on a scale of a world war, would see the US forced to spend 30-40% of it's GDP on war.
The efficiency would plummet off a cliff if the US even tried to approach that level of conflict.
This is incredibly GDP brained thinking. The numbers are not immutable facts that exist as a natural law, ultimately you have to produce those items in the real world. Trying to support that many conflicts at once, which would be fighting on a scale of a world war, would see the US forced to spend 30-40% of it's GDP on war.